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Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 3382
Experience:  ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician
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2012 Freightliner Mercedes Benz Engine - Error Code. Eng 1,

Customer Question

2012 Freightliner Mercedes Benz Engine - Error Code. Eng 1, Diag 2, Diag 1 - Truck gives warning and stops.
Submitted: 2 years ago.
Category: Medium and Heavy Trucks
Expert:  Jeremy replied 2 years ago.
My name is ***** ***** I will assist you with your concerns.
Is that the exact code you are getting? Is this a M2 Freightliner by chance?
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Customer: replied 2 years ago.
Sorry.....2012 freightliner cascadia
Expert:  Jeremy replied 2 years ago.
Thank you for that information.
If you check that code further, do you have a SPN number? If not, there is a fault in the ECM itself. Either the ground on the batteries is faulting or the NVRAM in the ECM itself is faulting. Did you travel somewhere that had lightning or a lightning storm pass over your vehicle? I usually see these codes on those MBE/DD series engines when they were struck by lightning like through the trailer or something. (I'm in Florida so it is very common here)
Customer: replied 2 years ago.
How do I retrieve the SPN number? And yes.....the truck travels in Florida.
Expert:  Jeremy replied 2 years ago.
It will follow behind the code. If you have no SPN, then the failure is in the ECM itself usually.
When you press the enter button on the steering wheel, the code continues. You would get that before the diag 2 code.